Steam-boiler



3 Sheets-Sheet 1. E. J. MOORE,- STEAM BOILER.

Patented M y Z; 6 mm. K.

I 3 Sheets-Sheet 3.

(No Model.)

B. J. MOORE. STEAM BOILER.

No. 451,734; Patented May 5, 1891.

220 r/zeys rm v us ca., vmrro-umo" WASNINEYDN n c NITEI) STATES EDIVARD J. MOORE, OF PHILADELPHIA, PENNSYLVANIA.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 451,734, dated May 5, 1891, Application filed June 6, 1890- $erial No. 354,445. (No model.)

To all whom it may concern.-

Be it known that I, EDWARD J. MOORE, a citizen of the United States, anda resident of Philadelphia, Pennsylvania, have invented certain Improvements in Sectional Tubular Steam-Boilers, of which the following is a specification.

The object of my invention is to dispense with the use of cast-iron in the construction of sectional steam-boilers and to provide for an even expansion of the parts composing the boiler.

My improved boiler is especially adapted for marine service, where strength and lightness must be combined, the number of joints comparatively few, and the parts easy of access for examination and repair. My boiler embodies all these features, and at the same time it is of the sectional type, making it exempt from destructive explosions, and being made of steel or high-grade iron the ruptures usually found in sectional cast boilers are entirely obviated. I dispense with the addi tional stays generally used in cheap iron or steel boilers and so form the sections that braces to a great extent are dispensed with. I also construct the boiler so that it can be readily transported in sections and built into a vessel or set up therein by simply nippling the several parts together, as fully described hereinafter, reference being had to the accompanying drawings, in which- Figure 1 is a longitudinal sectional view of my improved sectional steam-boiler. Fig. 2 is a transverse section on the line 1 2, Fig. 1.

- Fig. 3 is a transverse section on the line 3 4,

Fig. 1. Fig. at is a perspective view of one of the coupling-plates. Fig. 5 is an enlarged view of one of the sections of the front leg. Fig. 6 is a detached perspective view of one of the sections of the front leg. Fig. 7 is a sectional plan view on the line 3 4, Fig. 1. Figs. 8 and 9 are views showing the cleaninghole covers. Figs. 10, 11,12, and 13 are views of modifications of my invention; and Fig. 14 is an enlarged sectional view of one of the defleeting-plates.

A is the horizontal drum of the boiler, mounted in the usual foundation B, inclosing the fire-chamb or O and combustion-011mm her 0'.

connection with the front leg D.

Z; is the fire'door, and b the ash-pit door; 0, the grate, and c the bridge-wall.

O is the smoke-flue, and c is the man-hole door, by which access can be had to the rear of the furnace.

b is the front cover-plate, which, when removed, exposes the front leg of the boiler, and it is through this opening that the implements are inserted for cleaning the tubes and plates.

Depending from the front portion of the horizontal drum A is a leg D. This leg is composed of a number of sections d, the upper section being secured in the present instance vto the coupling-plate A on the horizontal drum by nipples 6. This couplingplate is struck up from a single sheet of steel to the proper shape and flanged, as clearly shown in Fig. 4:, having a flat base in line with the upper surface of the upper section of the leg D. Each section cl is secured to the clearly in Fig. 1, in which case the nipples gradually increase from the lower to the upper section. To gain the increase of area, instead of increasing the diameters of the nipples the number of nipples may be increased. I preferably re-enforce the sections by plates a as clearly shown in Figs. 10 and 11.

Depending from the rear end of the horizontal drum A is the back leg E, having a mud-section E at the base provided with an outlet 6. By removing the cover of this outlet the mud can be withdrawn from the leg. This leg E is connected to the horizontal drum by a series of vertical tubes F, the tubes. being expanded in the crown of the vertical drum and into the sheet of the horizontal drum, which is expanded and formed in the manner shown in Fig. 1, although a separate plate may be secured to the. drum and the tubes expanded into this plate, as shown in Extending from the leg D to the leg E are a series of water-tubes G. These tubes are inclined, as shown, to allow them to drip into the mudsection, and the face of the back leg as well as the face of the front leg is at right angles to the line of the tubes.

The back leg E is semicircular in crosssection, as shown in Fig. 7, the front face of the drum being flat, so that the tube can be readily expanded into the drum without elaborate fitting.

Deflecting-plates z' i are placed transversely in the furnace and direct the products of combustion in a circuitous course through the combustion-chamber. These plates are made up of sections 2", which lap over each other and are riveted together, as shown in Fig. 14.

In the leg D, directly opposite each longitudinal tube, is an opening h, through which the tube-cleaners can be passed when the plate I) is removed. These openings are closed by suitable caps h, of the peculiar form shown in Figs. 8 and 9, and by so coupling the sect-ions dof the leg D together as to leave a space between the sections the exterior surface of the tubes can also be cleaned. The sections (Z are made as shown in Fig. 6, being struck up from sheet-steel, the header (1' having the hand-holes and nippling-holes, and the section d having the tube-holes. The two headers are riveted together, as shown in Figs. 1 and 5, and I also tie the two headers together by stays 7c of tubing, as shown in Figs. 1 and 5, the tubes being of such diameter as to allow for the introduction of cleaning-bars into the interior of the furnace through these tubes and between the tubes G, which are secured to the same section.

The feed-water-inlet tube a extends from the front end of the horizontal drum A to a point directly above the opening into the vertical drum E, and the steam-pipe a hasa series of openings throughout a portion of its length.

It will be seen that by constructing a boiler as above the circulation is complete, the cooler water having a downward tendency in the back leg E, and as steam forms in the tubes it passes through the tubes to the front leg and up into the horizontal drum.

The upper section of the front leg D of the boiler may be secured to the horizontal drum in the manner shown in Fig. 10, the drum being expanded the same as the portion of the drum Fig. 1, which receives the couplingtubcs of the back leg, or the leg may be coupled to the drum, as shown in Fig. 11, the drum having a series of orifices a and re-enforced by a plate a and the upper section D may be cut away and the free end d bent up and flanged and riveted to the drum, or both the drum and upper section (Z may be cut away and both flanged, one flange fitting inside the other and riveted together, as shown in Fig. 12.

Instead of theseries of tubes F connecting the drum E to the drum A,a single tube may be used, this tube being flanged and secured to the drum by rivets. Thus it will be seen by the construction that the boiler can be transported in two or more parts, and when applied to vessels the tube-section having the front and backlegs attached can be made up and fitted together and transported independently of the horizontal drum A, which can be readily fitted to the tube-section after it has been placed in position. I

In some instances the front leg D and back leg E may be vertical instead of inclined, as shown in Fig. 1, or may be made as shown in Fig. 13, the sides being inclined, while the top and bottom plates are horizontal.

The feed-pipe a is firmly secured to acoupling-head a Fig. 1, which is secured to the head of the drum A.

By making the back leg E wide, as shown in Fig. 3, and bunching the connecting-tubes F, I form a space or passage w on each side of the tubes and between the drumA and leg E, so that access may be had to the space above the tubes G.

I claim as my invention- 1. The combination, in a steam-boiler of the sectional type, of a horizontal drum, the front leg, and a back leg, said back leg being semicircular in cross-section and connected to the drum by tubes, with water-tubes extending from the front leg to the back leg, said tubes being fitted into the fiat portion of the back leg, substantially as described.

2. The combination, in a direct-circulating water-tube boiler, of the horizontal drum, the sectional front leg made up of a series of horizontal sections extending from side to side across the boiler, nipples securing said sections together, a rear leg formed of a single tube, to which all the water-tubes are connected, said leg being fixed in the foundation of the boiler and rigidly secured to the horizontal drum, and inclinedwater-tubes connecting the horizontal sections of the front leg to the single fixed tube forming the rear leg, the whole so arranged that the expansion and contraction of the tubes will be taken up solely by the sectional front leg, substantially as described.

IIO

3. The combination, in a water-tube boiler,

of the front leg, the horizontal drum and the rear drum, and tubes connecting the front leg and rear drum, the front leg being made of a series of sections nippled together, the area of the nipples of the upper section being greater than the area of the nipples of the lower section, substantially as specified.

4. A rectangular attachment to an overhead drum of a water-tube boiler formed of one piece, having vertical straight ends, tubeholes therein, and flanges turned outward for a union with the upper water and steam drum, the under side of said piece being beveled at an angle to correspond with the rake of the inclined tubes and having a series of tube-holes, whereby the attachment is united to the headers by means of nipples 0r tubes, as set forth.

5. The combination of the horizontal drum, the leg depending therefrom, a couplingplate secured to said drum, nipples securing said coupling-plate to the leg, and right-angled tubes extending from the sides of the coupling-plate to the upper portion of theleg, substantially as described.

6. In a Water-tube boiler, the deflectingplates made in sections, having lips overlapping each other, forming smooth upper and under surfaces, and bolted or riveted together and resting on the side Walls of the furnace, substantially as described.

EDVARD J; MOORE.

Witnesses:

EUGENE ELTERICH, HARRY SMITH. 

